# Audio gurus get in here...
**URL:** https://forums.speedlife.net/t/audio-gurus-get-in-here/85470
**Category:** SON240sx Automotive
**Created:** [May 2, 2005, 7:09pm UTC](https://forums.speedlife.net/t/audio-gurus-get-in-here/85470 "2005-05-02T19:09:06Z")
**Posts on this page:** 12
**Page:** 1
### Author:  [@Gonad](https://forums.speedlife.net/u/Gonad)
#### Post date: [May 2, 2005, 7:09pm UTC](https://forums.speedlife.net/t/audio-gurus-get-in-here/85470/1 "2005-05-02T19:09:06Z")
Ok, so all the audio equipment in my car is replaced with aftermarket
stuff (rear speakers, front door speakers, head unit) as well as an added
subwoofer+amp.
My music sounds fine, clean, no distortion, etc.
I also have an iPod that I bought an auxiliarry input for so that I can hook
it up to my head unit.
It was fine, but then I started hearing a buzzing/high pitched whining
noise while driving (and the noise seemed to change as I hit the accelerator).
So I went and bought a ground-loop-isolator and hooked it up to the
sub-woofer RCA jacks. But i still seem to get the noise.
I don’t know what to do?
Any ideas?
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### Author:  [@Sasha\_SG](https://forums.speedlife.net/u/Sasha_SG)
#### Post date: [May 2, 2005, 7:34pm UTC](https://forums.speedlife.net/t/audio-gurus-get-in-here/85470/2 "2005-05-02T19:34:14Z")
sounds like the system is picking up alternator noise.
how to fix it? only jantos knows.
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### Author:  [@spd-dmn](https://forums.speedlife.net/u/spd-dmn)
#### Post date: [May 2, 2005, 7:49pm UTC](https://forums.speedlife.net/t/audio-gurus-get-in-here/85470/3 "2005-05-02T19:49:52Z")
If your speakers are connected directly to the HU then you’ll need to reroute the ground from the p/antenna to a separate source (eg. shifter bolt).
The only reason the ground loop isolators took away the whine for me is cuz my components are amped.
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### Author:  [@ADAM](https://forums.speedlife.net/u/ADAM)
#### Post date: [May 2, 2005, 8:13pm UTC](https://forums.speedlife.net/t/audio-gurus-get-in-here/85470/4 "2005-05-02T20:13:38Z")
check your grounds…and reground them…
you may have to add an inline filter…
alternator whine is a common problem…
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### Author:  [@bing](https://forums.speedlife.net/u/bing)
#### Post date: [May 2, 2005, 9:53pm UTC](https://forums.speedlife.net/t/audio-gurus-get-in-here/85470/5 "2005-05-02T21:53:18Z")
i get that too but only from my passenger side mid-woofer…
strange.
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### Author:  [@Mr\_zero](https://forums.speedlife.net/u/Mr_zero)
#### Post date: [May 2, 2005, 11:46pm UTC](https://forums.speedlife.net/t/audio-gurus-get-in-here/85470/6 "2005-05-02T23:46:06Z")
I am gettin mad alternator noise, which is exactly why I want someone to do my install. Unless of course the info is posted here and is mad easy to fix. I gotta get rid of that shiz, it is so annoying. I just tell chicks my car sounds like an aircraft… :shock:
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### Author:  [@Gonad](https://forums.speedlife.net/u/Gonad)
#### Post date: [May 3, 2005, 4:02am UTC](https://forums.speedlife.net/t/audio-gurus-get-in-here/85470/7 "2005-05-03T04:02:06Z")
If it’s just a ground issue, what’s the best ground? The -ve terminal on the
battery? :dunno:
I have several things hooked up with the same wire that grounds
everything (head unit and gauges mainly).
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### Author:  [@Wiltzor](https://forums.speedlife.net/u/Wiltzor)
#### Post date: [May 3, 2005, 6:20am UTC](https://forums.speedlife.net/t/audio-gurus-get-in-here/85470/8 "2005-05-03T06:20:36Z")
My car was whining pretty bad when I first got it. So I ripped my interior apart and found about 30 feet of unused speaker wire run through the car. Removed it, and problem gone.
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### Author:  [@GreyGandalf\_S14](https://forums.speedlife.net/u/GreyGandalf_S14)
#### Post date: [May 3, 2005, 5:06pm UTC](https://forums.speedlife.net/t/audio-gurus-get-in-here/85470/9 "2005-05-03T17:06:09Z")
> [@Gonad](#):
>
> If it’s just a ground issue, what’s the best ground? The -ve terminal on the
> battery? :dunno:
>
> I have several things hooked up with the same wire that grounds
> everything (head unit and gauges mainly).
don’t hook up multiple things to one ground, and keep the ground wire as short as possible. i like the bolts for the shifter as someone mentioned earlier, there are also a couple places in the trunk and behind the dash (i got an s14 though)
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### Author:  [@fadge](https://forums.speedlife.net/u/fadge)
#### Post date: [May 8, 2005, 11:59am UTC](https://forums.speedlife.net/t/audio-gurus-get-in-here/85470/10 "2005-05-08T11:59:22Z")
you need a cap man, itll draw more power off the cap then then the batter, solves dimming od dash lights when your subs are going as well
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### Author:  [@SHIFT\_KA24DET](https://forums.speedlife.net/u/SHIFT_KA24DET)
#### Post date: [May 8, 2005, 4:30pm UTC](https://forums.speedlife.net/t/audio-gurus-get-in-here/85470/11 "2005-05-08T16:30:21Z")
What you are getting is a ground loop.
Ground your deck to the same point as the Ipod interface.
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### Author:  [@Gonad](https://forums.speedlife.net/u/Gonad)
#### Post date: [May 8, 2005, 6:32pm UTC](https://forums.speedlife.net/t/audio-gurus-get-in-here/85470/12 "2005-05-08T18:32:53Z")
> [@SHIFT\_SR20DET](#):
>
> What you are getting is a ground loop.
>
> Ground your deck to the same point as the Ipod interface.
The iPod doesn’t ground to anything. It’s a portable.
I’m going to try grounding some the head unit and gauges to different
ground sources rather then all to one thing.